<template>
	<div>
		<!-- 面包屑导航 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>

		<!-- 卡片区域 -->
		<el-card>
			<!-- alert警告栏 -->
			<el-alert title="添加商品信息" type="info" show-icon center :closable="false"></el-alert>
			<!-- 步骤条区域 -->
			<el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
				<el-step title="基本信息"></el-step>
				<el-step title="商品参数"></el-step>
				<el-step title="商品属性"></el-step>
				<el-step title="商品图片"></el-step>
				<el-step title="商品内容"></el-step>
				<el-step title="完成"></el-step>
			</el-steps>
			<!-- tab栏区域 -->
			<el-form
				:model="addForm"
				:rules="addFormRules"
				ref="addFormRef"
				label-width="100px"
				label-position="top"
			>
				<el-tabs
					v-model="activeIndex"
					tab-position="left"
					:before-leave="beforeTabLeave"
					@tab-click="tabClicked"
				>
					<el-tab-pane label="基本信息" name="0">
						<el-form-item label="商品名称" prop="goods_name">
							<el-input v-model="addForm.goods_name"></el-input>
						</el-form-item>
						<el-form-item label="商品价格" prop="goods_price">
							<el-input v-model="addForm.goods_price" type="number"></el-input>
						</el-form-item>
						<el-form-item label="活动重量" prop="goods_weight">
							<el-input v-model="addForm.goods_weight"></el-input>
						</el-form-item>
						<el-form-item label="活动数量" prop="goods_number">
							<el-input v-model="addForm.goods_number"></el-input>
						</el-form-item>
						<el-form-item label="商品分类" prop="goods_cat">
							<!-- 选择商品分类的级联选择框 -->
							<el-cascader
								style="width:250px;"
								v-model="addForm.goods_cat"
								:options="catelist"
								:props="propsList"
								@change="handleChange"
							></el-cascader>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品参数" name="1">
						<el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
							<!-- 复选框组 -->
							<el-checkbox-group v-model="item.attr_vals">
								<el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
							</el-checkbox-group>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品属性" name="2">
						<el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
							<el-input v-model="item.attr_vals"></el-input>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品图片" name="3">
						<el-upload
							action="http://127.0.0.1:8888/api/private/v1/upload"
							:on-preview="handlePreview"
							:on-remove="handleRemove"
							list-type="picture"
							:headers="headerObj"
							:on-success="handleSuccess"
						>
							<el-button size="small" type="primary">点击上传</el-button>
							<div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
						</el-upload>
					</el-tab-pane>
					<el-tab-pane label="商品内容" name="4">
						<!-- 富文本编辑器 -->
						<quill-editor ref="myQuillEditor" v-model="addForm.goods_introduce" />
						<el-button type="primary" class="btn" @click="add">添加商品</el-button>
					</el-tab-pane>
				</el-tabs>
			</el-form>
		</el-card>
		<!-- 图片预览 -->
		<el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
			<img class="pic" :src="previewPath" />
		</el-dialog>
	</div>
</template>
<script>
import _ from 'lodash'
export default {
	data() {
		return {
			activeIndex: '0',
			addForm: {
				goods_name: '',
				goods_price: 0,
				goods_weight: 0,
				goods_number: 0,
				goods_cat: [],
				pics: [],
				goods_introduce: '',
				attrs: []
			},
			addFormRules: {
				goods_name: [
					{
						required: true,
						message: '请输入商品名称',
						trigger: 'blur'
					}
				],
				goods_price: [
					{
						required: true,
						message: '请输入商品价格',
						trigger: 'blur'
					}
				],
				goods_weight: [
					{
						required: true,
						message: '请输入商品重量',
						trigger: 'blur'
					}
				],
				goods_number: [
					{
						required: true,
						message: '请输入商品数量',
						trigger: 'blur'
					}
				],
				goods_cat: [
					{
						required: true,
						message: '请选择商品分类',
						trigger: 'blur'
					}
				]
			},
			catelist: [],
			propsList: {
				expandTrigger: 'hover',
				value: 'cat_id',
				label: 'cat_name',
				children: 'children'
			},
			manyTableData: [],
			onlyTableData: [],
			headerObj: {
				Authorization: window.sessionStorage.getItem('token')
			},
			previewPath: '',
			previewVisible: false
		}
	},
	created() {
		this.getCateList()
	},
	methods: {
		async getCateList() {
			const { data: res } = await this.$http.get('categories')
			if (res.meta.status !== 200) {
				return this.$message.error(res.meta.msg)
			}
			this.catelist = res.data
		},
		handleChange() {
			//级联选择器选中项变化
			if (this.addForm.goods_cat.length !== 3) {
				this.addForm.goods_cat = []
			}
		},
		beforeTabLeave(activeName, oldActiveName) {
			//tab切换事件
			if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3)
				return false
		},
		async tabClicked() {
			//tab点击切换
			if (this.activeIndex === '1') {
				const { data: res } = await this.$http.get(
					`categories/${this.addForm.goods_cat[2]}/attributes`,
					{
						params: { sel: 'many' }
					}
				)
				if (res.meta.status !== 200) {
					return this.$message.error(res.meta.msg)
				}
				res.data.forEach(item => {
					item.attr_vals =
						item.attr_vals.length === 0
							? []
							: item.attr_vals.split(' ')
				})
				this.manyTableData = res.data
			} else if (this.activeIndex === '2') {
				const { data: res } = await this.$http.get(
					`categories/${this.addForm.goods_cat[2]}/attributes`,
					{
						params: { sel: 'only' }
					}
				)
				if (res.meta.status !== 200) {
					return this.$message.error(res.meta.msg)
				}
				this.onlyTableData = res.data
			}
		},
		handleSuccess(res) {
			//上传图片成功的事件
			const picInfo = { pic: res.data.tmp_path }
			this.addForm.pics.push(picInfo)
		},
		handlePreview(file) {
			//图片预览效果
			this.previewPath = file.response.data.url
			this.previewVisible = true
		},
		handleRemove(file) {
			//图片预览的关闭,移除图片
			//找到图片临时路径
			const filePath = file.response.data.tmp_path
			//移除图片
			const i = this.addForm.pics.findIndex(item => item.pic === filePath)
			this.addForm.pics.splice(i, 1)
		},
		add() {
			//添加商品确定按钮
			this.$refs.addFormRef.validate(async valid => {
				if (!valid) {
					return this.$message.error('请输入完整的信息')
				}
				const form = _.cloneDeep(this.addForm)
				form.goods_cat = form.goods_cat.join(',')
				this.manyTableData.forEach(item => {
					const newInfo = {
						attr_id: item.attr_id,
						attr_value: item.attr_vals.join(' ')
					}
					this.addForm.attrs.push(newInfo)
				})
				this.onlyTableData.forEach(item => {
					const newInfo = {
						attr_id: item.attr_id,
						attr_value: item.attr_vals
					}
					this.addForm.attrs.push(newInfo)
				})
				form.attrs = this.addForm.attrs
				const { data: res } = await this.$http.post('goods', form)
				if (res.meta.status !== 201) {
					return this.$message.error(res.meta.msg)
				}
				this.$message.success(res.meta.msg)
				this.$router.push('/goods')
			})
		}
	}
}
</script>
<style lang="less" scoped>
.el-checkbox {
	margin: 0 10px 0 0 !important;
}
.pic {
	display: block;
	margin: 0 auto;
	max-width: 350px;
}
.btn {
	margin: 15px 0 0 0;
}
</style>